Some packets that I found.
RECV:
SERWER CHOOSED 0x91
READY TO PUT SECOND PW 0xAA
PLAYER MOVE : 0x16
PLAYER MOVE STOP: 0xAC
PLAYER SIT 0x9E
PLAYER DISAPEAR 0x8B
PLAYER APEAR 0x7F
PLAYER NEW COORD (TELE / REV) 0x55
PLAYER TELEPORTED (LORD SHOW?) 0x8E
PLAYER LOG OFF 0x88
PLAYER GET INVENTORY 0x90
PLAYER USE ITEM (MED) 0x82
PLAYER HP/MP/maxHP/maxMP 0xA6
PLAYER HP/MP/EXP CHANGED 0x60
PLAYER NEW ITEM IN INVENTORY 0x9A
MOB MOVE 0xAD
MOB MOVE STOP 0xC4
MOB APEAR 0xA8
MOB DISAPEAR 0x9C
MOB STATE ( BH / DED) 0x9E
DROP APEAR 0xAE
DROP DISAPEAR 0x6A
SOMEONE ATTACK PLAYER 0xA5
HS/PING/INTERNAL 0x89
HS/PING/INTERNAL 0x7B
SEND:
TYPE FORMAT EXT
USE ITEM 0x49 d item id
PICK ITEM 0xC0 ddd item X / Y / ID
ANIM SKILL 0x5D bd animation of skill
SKILL / BH 0x84 b / bd / bdd... send skill with options depends on skill type
LOGIN ID/PW 0x09 ss s- char string pw s- char string pw
LOGIN PW2 0x75 bs b = 0 s - char string pw2